28859972 has 12 divisors (see below), whose sum is σ = 50568336. Its totient is φ = 14411880.

The previous prime is 28859953. The next prime is 28859981. The reversal of 28859972 is 27995882.

It is a self number, because there is not a number n which added to its sum of digits gives 28859972.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 554 + ... + 7617.

It is an arithmetic number, because the mean of its divisors is an integer number (4214028).

Almost surely, 2^28859972 is an apocalyptic number.

It is an amenable number.

28859972 is a deficient number, since it is larger than the sum of its proper divisors (21708364).

28859972 is a wasteful number, since it uses less digits than its factorization.

28859972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9058 (or 9056 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 28859972 is about 5372.1478013919. The cubic root of 28859972 is about 306.7363898387.

The spelling of 28859972 in words is "twenty-eight million, eight hundred fifty-nine thousand, nine hundred seventy-two".